Out-of-bounds read via truncated RNDIS header
Published Jul 25, 2026 · Updated Jul 25, 2026
Out-of-bounds read in the Linux Kernel USB RNDIS gadget function allows physically proximate attackers to disclose kernel memory. The rndis_rm_hdr function reads MessageType, MessageLength, DataOffset, and DataLength before confirming that the received buffer contains the full header. Exploitation requires an enabled RNDIS USB gadget and a malformed header from the connected host; the read can disclose adjacent data or interrupt service but does not write kernel memory.
Summary
What happened
Out-of-bounds read in the Linux Kernel USB RNDIS gadget function allows physically proximate attackers to disclose kernel memory. The rndis_rm_hdr function reads MessageType, MessageLength, DataOffset, and DataLength before confirming that the received buffer contains the full header. Exploitation requires an enabled RNDIS USB gadget and a malformed header from the connected host; the read can disclose adjacent data or interrupt service but does not write kernel memory.
The record
- CVE
- CVE-2026-64505
- Published
- Jul 25, 2026
- Updated
- Jul 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1200
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 25, 2026CVE publishedPublication date reported by the CVE source.
- Jul 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <5.10.261
- Affected versionversion=0 <5.15.212
- Affected versionversion=0 <6.1.178
- Affected versionversion=0 <6.12.96
- Affected versionversion=0 <6.18.39
- Affected versionversion=0 <6.6.145
- Affected versionversion=0 <7.1.4
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <200dd5092296ad4d5ae47f8445a2fb1edd1da973
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <21b5bf155435008e0fb0736795289788e63d426f
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7515a6d4a9e9e4838b833825882efa00e85f8901
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9facd79028a7807879eb441d12f0e00720980aa3
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9ffd567d7bf269824dfac06f8ab9a32fef72699b
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b73c0142e3acdc063b50c33afb7be19cdb2cd410
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ba2cc601e59fe68716646199a33303493513e2e3
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6ef5af7d0fe1ac31e5653a77e6d775dd36bc433
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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